Bone marrow inflammation in haematological malignancies.

Area of Science:

• Oncology
• Immunology
• Hematology

Background:

• Tissue inflammation is a key feature of the tumor microenvironment.
• In the bone marrow, inflammation affects hematopoietic progenitor cells and immune cells, promoting cancer growth.
• This review focuses on myeloid and lymphoid malignancies, using acute myeloid leukemia and multiple myeloma as examples.

Purpose of the Study:

• To provide an overview of inflammatory changes in the bone marrow microenvironment of myeloid and lymphoid malignancies.
• To highlight unique and shared features of inflammation in progenitor cell and plasma cell niches.
• To explore the divergent effects of inflammation on normal bone marrow niches and identify possible drivers.

Main Methods:

• Review of current understanding of bone marrow inflammation in malignancies.
• Comparative analysis of inflammation in acute myeloid leukemia and multiple myeloma.
• Exploration of the roles of tumor cells, myeloid cells, and stromal cells in inflammatory changes.

Main Results:

• Inflammation uniquely and differently impacts normal bone marrow niches in various malignancies.
• Tumor cells and normal bone marrow constituents (myeloid, stromal cells) contribute to inflammatory changes.
• Shared and distinct inflammatory features exist in progenitor cell and plasma cell niches.

Conclusions:

• Understanding disease-specific inflammation dynamics is crucial for targeting these processes.
• Targeting bone marrow inflammation may improve patient outcomes in myeloid and lymphoid malignancies.
• Further research into the drivers of divergent inflammatory effects is warranted.